BMW M3 Forum (E90 E92) - View Single Post - Increased emissions code keeps haunting me

austin2334 · 04-07-2026, 08:06 AM

I bought a smoke machine to test for exhaust and vacuum leaks. If I find nothing, I’m thinking it may be the secondary air valve. Is there a way to test the valves with ista?

04-07-2026, 08:06 AM	#8
austin2334 New Member 11 Rep 25 Posts Drives: 2012 M3 Join Date: Sep 2022 Location: Tacoma, Wa iTrader: (0)	I bought a smoke machine to test for exhaust and vacuum leaks. If I find nothing, I’m thinking it may be the secondary air valve. Is there a way to test the valves with ista?
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